class Student(object):
    name = 'Student'
    def setName(self,newName):
        self.name = newName
s1 = Student()
s2 = Student()
s1.name = 's1'
s2.name = 's2'
print(s1.name,s2.name,Student.name)
s1.setName('newS1')
print(s1.name)
print(Student.__dict__)